Mishra, Biswajit and M. Al-Hashimi, Bashir
Subthreshold FIR Filter Architecture for Ultra Low Power Applications.
International Workshop on Power and Timing Modeling, Optimization and Simulation (PATMOS 2008)
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Subthreshold design has been proposed as an effective technique for designing signal processing circuits needed in wireless sensor nodes powered by sources with limited energy. In this paper we propose a subthreshold FIR architecture which brings the benefits of reducedleakage energy, reduced minimum energy point, reduced operating voltage and increased operating frequency when compared with recently reported subthreshold designs. We shall demonstrate this through the design of a 9-tap FIR filter operating at 220mV with operational frequency of 126kHz/sample consuming 168.3nW or 1.33pJoules/sample. Furthermore, the area overhead of the proposed method is less than that of the transverse structure often employed in subthreshold filter designs. For example, a 9-tap filter based on transverse structure has 5X higher area than the filter designed using our proposed method.
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Subthreshold FIR Filter Architecture for Ultra Low Power Applications. (deposited 09 Jul 2008 15:41)
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